Matlab - 圓點上的點矩陣

Question

如何在Matlab中找到構成任何半徑圓的邊的點矩陣？如果我繪製這些點，我應該接近一個圓圈（儘管一個光滑的圓圈由無數個點組成）。

Answer 1

radius = 5;         %desired radius 
numPoints = 1000;        %Number of points in your circle 
angles = linspace(0,2*pi,numPoints)';   %Angles evenly spread around the circle, from 0 to 2*pi radians 
xyCircle = radius*[cos(angles) sin(angles)]; %This is the matrix you probably want 

plot(xyCircle(:,1), xyCircle(:,2),'.'); %Quick plot to check the result 
axis equal;